Extended Data Fig. 4: Emission spectra of single molecules resonantly driven by a CW laser at varied excitation rates.

a, b, Emission spectra of molecules M1 (a) and M2 (b) at a series of excitation levels (S = 0.2, 0.5, 1, 2, and 9).

a, b, Emission spectra of molecules M1 (a) and M2 (b) at a series of excitation levels (S = 0.2, 0.5, 1, 2, and 9).